Hi, @support29.
Thanks for visiting here in the Community.
Yes, you're correct. You can click the export icon to the right with the blue square and arrow to export your mileage data in QuickBooks Online.
Here's how:
1. Click Mileage.
2. Select the Export icon.
After clicking the export icon, it will download automatically using .CSV file format on Excel. See the screenshot below how it looks like:

Please see this article for more detailed steps about exporting your mileage in QuickBooks Online: Track mileage in QuickBooks Online.
Just in case, you might check this article for future reference about setting up manual tracking: Manually track mileage for multiple vehicles.
If you need further assistance with the workaround, just let me know. I'm here whenever you need more help.
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